43 results found
    1. Cell Biology
    2. Chromosomes and Gene Expression

    cAMP signaling regulates DNA hydroxymethylation by augmenting the intracellular labile ferrous iron pool

    Vladimir Camarena et al.
    cAMP is identified to play a novel role in regulating DNA demethylation and gene transcription by augmenting the intracellular reactive Fe(II) pool.
    1. Cell Biology

    Endosomal Rab cycles regulate Parkin-mediated mitophagy

    Koji Yamano et al.
    Parkin ubiquitination of damaged mitochondria recruits the Rab GEF, RABGEF1, to regulate downstream Rab cycles and ATG9A recruitment to growing phagophores that are participating in mitophagy.
    1. Cell Biology

    RalB directly triggers invasion downstream Ras by mobilizing the Wave complex

    Giulia Zago et al.
    By moving from correlations to causality in cancer signal transduction using optogenetics, the sufficiency of RalB activation to trigger invasion and the underlying molecular mechanisms were established.
    1. Cell Biology

    Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis

    Alenka Guček et al.
    Live cell imaging shows that the cAMP-sensor Epac2, a target of major antidiabetic drugs, is central to fusion pore control during insulin granule exocytosis.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Cap-proximal nucleotides via differential eIF4E binding and alternative promoter usage mediate translational response to energy stress

    Ana Tamarkin-Ben-Harush et al.
    Differential eIF4E binding to transcription initiation nucleotides and alternative promoter usage of eIF1A, PABP and other genes are involved in the response of the translation machinery to energy stress.
    1. Developmental Biology

    Folded gastrulation and T48 drive the evolution of coordinated mesoderm internalization in flies

    Silvia Urbansky et al.
    Functional recapitulation of a likely evolutionary gain in gene expression shows that two genes are sufficient to switch mesoderm cell internalization from stochastic cell ingression to coordinated epithelial invagination.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Diversity and plasticity in Rab GTPase nucleotide release mechanism has consequences for Rab activation and inactivation

    Lars Langemeyer et al.
    Analysis of multiple guanine exchange factors shows that Rab activation can occur via a number of mechanistically distinct GDP-release pathways.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A Histidine pH sensor regulates activation of the Ras-specific guanine nucleotide exchange factor RasGRP1

    Yvonne Vercoulen et al.
    The Ras activator RasGRP1 that impacts Ras signals in immune cells, leukemias, and colorectal cancer, switches to an active conformation aided by a pH-sensitive histidine residue in a central location of the RasGRP1 molecule.
    1. Cell Biology
    2. Developmental Biology

    Rho1 activation recapitulates early gastrulation events in the ventral, but not dorsal, epithelium of Drosophila embryos

    Ashley Rich et al.
    Spatially and temporally patterned activation of the small GTPase Rho1 indicates that ventral-specific factors contribute to cell- and tissue-level behaviors during ventral furrow formation, the first step in Drosophila gastrulation.
    1. Developmental Biology

    Developmental lineage priming in Dictyostelium by heterogeneous Ras activation

    Alex Chattwood et al.
    The probability of a cellular response to a differentiation inducing signal is correlated with the dynamic expression of a Ras protein, and produces a ‘salt and pepper’ pattern of cell differentiation.

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